Question

The sum of first n positive intergers is given by  Sn =? n^s=n(n+1)/2,sn=n^3 ,n^s=n^2,n^s=n^2+1​

Answer 1

Answer:

it is given by Sn=n/2(2a+(n-1)d)

Answer 2

Step-by-step explanation:

Sn = n/2 × (2a+(n-1)d). or n/2 × (a + an)